/*
 * Copyright (C) 2005-2011 MaNGOS <http://www.getmangos.com/>
 *
 * Copyright (C) 2008-2011 Trinity <http://www.trinitycore.org/>
 *
 * Copyright (C) 2010-2011 ProjectSkyfire <http://www.projectskyfire.org/>
 * 
 * Copyright (C) 2011 ArkCORE <http://www.arkania.net/>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#ifndef ARKCORE_TYPECONTAINERVISITOR_H
#define ARKCORE_TYPECONTAINERVISITOR_H

/*
 * @class TypeContainerVisitor is implemented as a visitor pattern.  It is
 * a visitor to the TypeContainerList or TypeContainerMapList.  The visitor has
 * to overload its types as a visit method is called.
 */

#include "Define.h"
#include "Dynamic/TypeContainer.h"

// forward declaration
template<class T, class Y> class TypeContainerVisitor;

// visitor helper
template<class VISITOR, class TYPE_CONTAINER> void VisitorHelper(VISITOR &v,
		TYPE_CONTAINER &c) {
	v.Visit(c);
}
;

// terminate condition for container list
template<class VISITOR> void VisitorHelper(VISITOR &v,
		ContainerList<TypeNull> &c) {
}

template<class VISITOR, class T> void VisitorHelper(VISITOR &v,
		ContainerList<T> &c) {
	v.Visit(c._element);
}

// recursion for container list
template<class VISITOR, class H, class T> void VisitorHelper(VISITOR &v,
		ContainerList<TypeList<H, T> > &c) {
	VisitorHelper(v, c._elements);
	VisitorHelper(v, c._TailElements);
}

// terminate condition container map list
template<class VISITOR> void VisitorHelper(VISITOR &/*v*/,
		ContainerMapList<TypeNull> &/*c*/) {
}

template<class VISITOR, class T> void VisitorHelper(VISITOR &v,
		ContainerMapList<T> &c) {
	v.Visit(c._element);
}

// recursion container map list
template<class VISITOR, class H, class T> void VisitorHelper(VISITOR &v,
		ContainerMapList<TypeList<H, T> > &c) {
	VisitorHelper(v, c._elements);
	VisitorHelper(v, c._TailElements);
}

// array list
template<class VISITOR, class T> void VisitorHelper(VISITOR &v,
		ContainerArrayList<T> &c) {
	v.Visit(c._element);
}

template<class VISITOR> void VisitorHelper(VISITOR &/*v*/,
		ContainerArrayList<TypeNull> &/*c*/) {
}

// recursion
template<class VISITOR, class H, class T> void VisitorHelper(VISITOR &v,
		ContainerArrayList<TypeList<H, T> > &c) {
	VisitorHelper(v, c._elements);
	VisitorHelper(v, c._TailElements);
}

// for TypeMapContainer
template<class VISITOR, class OBJECT_TYPES> void VisitorHelper(VISITOR &v,
		TypeMapContainer<OBJECT_TYPES> &c) {
	VisitorHelper(v, c.GetElements());
}

template<class VISITOR, class TYPE_CONTAINER>
class TypeContainerVisitor {
public:
	TypeContainerVisitor(VISITOR &v) :
			i_visitor(v) {
	}

	void Visit(TYPE_CONTAINER &c) {
		VisitorHelper(i_visitor, c);
	}

	void Visit(const TYPE_CONTAINER &c) const {
		VisitorHelper(i_visitor, c);
	}

private:
	VISITOR &i_visitor;
};
#endif
